Improvement in cuspadores



N70. H9,705. Y Patented Oct. 10,1871. I

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PATENT OFFICE.

EUGENE A. HEATH,

IMPROVEMENT OF NEW YORK, N. Y.

IN CUSPADOR ES.

Specification forming part of Letters Patent No. 119,705, dated Octoberl0, 1871.

To all whom it may concern:

Be it known that I, EUGENE A. HEATH, of New York city, in the State ofNew York, have invented certain new and useful Improvements inGuspadores, of which the follow-ing is a speciiication setting forthwhat I consider th'e best means ofcarrying it into eiiect.

The accompanying drawing forms a part of this specification. Figure l isa vertical section, showing the construction in its proper position;vand Fig. 2, a double view, the strong lines being a section in an upsetor overturned position and the dotted lines an elevation inits uprightposi-tion.

Similar letters indicate like parts in both the gures. i

I form separately three metallic parts and unite them, after suitablepreparation, tightly and strongly by soldering. The lowermost, A, is ofcast-iron, thick at the extreme bottom and thinner toward the top. Itsupper edge is rabbeted and nicely iinished to receive the lower edge ofthe sheet-metal part B,.and form a flush exterior surface therewith, asshown. B is a piece of sheet-iron pressed in a Grimshaw press, orotherwise formed in the proper dome shape, and of eX- actly the properdiameter, and with a vertical flange at its upper edge, as shown. C isaconical piece, which may be similarly formed into shape. Its lower edgehas a lian ge which matches closely inside the iianged upper edge of B,and its upper edge is turned over by the ordinary tinsmiths tools orotherwise, and made to embrace a wire ring, D, to stiften it, theconstruction of which is obvious.

On soldering the several joints, smoothly and properly decorating thesurfaces, there results a metallic cuspadore not liable to fracture, andlighter than ordinary cuspadores on its upper side and much heavier thanordinary cuspadores on its lower side.

One of the important ends attained by my invention is extraordinarystability. If the cusp-` adore is upset by any chance and caused to liefor a time in the position indicated by the strong lines in Fig. 2, theexcess of weight in its base, taken in connection with its form, causesit to return again of itself to its proper upright position as soon asthe disturbing cause is removed.

I have shown the interior as formed with an offset, below which it ismaterially thicker than above, and prefer to so cast it. The upperportions may be formed, with some success, by spinning suitable thinbrass.

The junctions of the several parts may be further secured by causing onepart to cling upon a bead in addition to the soldering. In some casesrivets or the like ordinary or suitable fastenings may be employed.

I claim- A metallic cuspadore having a heavy base, A, and a light upperportion, B O, formed and combined substantially as and for the purposesherein set forth.

In testimony whereof I have hereunto set my name in presence of twosubscribing witnesses.

E. A. HEATH.

Witnesses AUGUsTUs l?. MoGEAw, C. C. LivINGs.

